Pumping jack



y i m, 1925. 1,525,989

R V. HILL.

PUMPING JACK Filed Nov. 22, 192's 2 Sheets-Sheet 1 150/)? y gmmoz M5676 ve R. V. HILL PUMPING JACK Filed 1923 2 Sheets-Sheet 2 Patented Feb; l@, 1925.

TED STATES PATENT OFFICE.

ROLLIN VICTOR HILL, OF KJ-kNSAS CITY, MISSOURI; i

PUMPING JACK.

Application filed November 22, 1923.

This invention relates to pumping jacks particularly useful for use in conjunction with oil 'well pumps, the primary object thereof residing in the provision of such a jack that will substantially increase the stroke of the sucker rod and this without providing a. power plant of a. horse power any greater than those used at the present time, the invention being also of such a nature as to occasion an absolute straight vertical movement of the sucker rod for thereby eliminating the great wear to the stuffing boxes which is at the present time a very pertinent result due to the fact that these sucker rods hardly if ever move in a true vertical direction.

One of the main objects of this invention resides in the provision of a pumping jack that may be easily associated "with practically all types of oil well pumping mechanisms for multiplying the stroke delivered at the well by the pull rod and to increase the same and thereby increase the suction and amount of oil pumped or on the other hand todecrease the stroke and lessen the amount of oil pumped, these results being occasioned by changing the connections between certain of the lever elements included in the present invention.

An additional object of the invention resides in the provision of a device of the above character that may be readily dismantled or set up as required, the nature of the same being such that when once set up the same will operate effectively under all conditions.

With the above and other objects in view as the nature of the invention is better understood, the same comprises the novel form, combination and arrangement of parts hereinafter more fully described, shown in the accompanying drawings and claimed.

In the drawings wherein there is shown the most practical embodiment of the inven tion with which I am at this time familiar, and wherein like reference characters indi- Serial No. 676,335.

cate corresponding parts throughout the 'different views,--

Figure l is a front elevational view of I a pump jack constructed in accordance with" the present invention, the same being shown as associated with an cil well pump and the" difierent elements thereof in their respective positions at the down stroke of the pump sucker rod,

Figure 2 is a top plan view of the device shown in Figure l, p

Figure 3 is an edge elevational' view of the present pump jack the different elements 7 thereof being shown in their respective positions when the before mentioned sucker rod is at its up stroke,

Figure 4 is a top plan view of the supporting beam structure for the pump jack,

Figure 5 is an enlarged longitudinal sectional view taken substantially upon the line 55 of Figure 1' and looking upwardly in the direction of the arrows for more clear ly disclosing the cross head connectionbetween the upper end of the sucker'rod and the uppermost pair of levers that comprise an essential portion of the present pump jack, and

Figure 6 is an enlarged fra-gmentaryelevationalview of a. pair of the inter-connected lever members comprised in the present invention.

Now having particular reference to the drawings, 5 indicates the well tubing or pip ing provided at its upper end with a stuf fing box 6 and within which is rectilineally movable the usual sucker rod 7.

My pump jack per se, embodies the provision of a cross'beam designated generally 8, the same comprising a pair of fiat spaced and parallel bars 99 rigidly connected at their opposite ends to tie plates 10 embedded within or bolted to the upper ends of con crete bases 1111 that are positioned upon opposite sides of the well being pumped as clearly shown in Figures 1 and 2. These beams 99 are formed intermediate their ends and at opposed points with curvilinear portions 12l2 for allowing of the extension of the well piping or tubing 5 between said bars.

Rigidly connected to the sucker rod 7 and at a point adjacent the upper end thereof is a cross head 13 that comprises as more clearly shown in Figures 2 and 5, a pair of relatively short channel bars 14-14 in spaced parallel relation to each other and being formed intermediate their ends with opposed curvilinear portions 15 between which the sucker rod 7 engages and to which the same is rigidly'secured.

Pivotally connected as at 1616 to the cross beam 8 and upon opposite sides of the well piping or tubing 5, are the lower levers 17-17 of a pair of opposed toggles, the upper ends thereof being bifurcated as at 18 for the pivotal connection as at 19 of the adjacent ends of a pair of upper levers 20--20. This last mentioned pair of levers 20 extend inwardly and upwardly and are in turn pivotally connected at their opposite ends as at 21-21 between the relatively short bars lee-1 1 constituting the cross head 13.

Pivotally connected intermediate its ends as at 22 to a vertical plate 23 carried by the beam 8 and at one side of the lever structure above described, is a rocking lever 24 to the upper end of which is pivotally secured at 25, one end of a pull rod 26 as well as one end of a connecting link 27, this connecting link 27 extending downwardly across the pump jack mechanism and being adjustably pivotally secured at any one or more of three points to the remote one of the lowermost pair of rocking levers 17 and which pivotal connection is designated by the reference character 28.

Pivotally secured as at 29 to the lower end of the rocker arm 24: is an upwardly extending connecting link 30 that is in turn selectively pivotally secured as at 31 within any one of three or more openings 32 in the adjacent rocking lever 17 of the lowermost pair of rocking levers.

It will therefore be seen that a relatively short pull upon the pull rod 26 through the medium of the usual form of power plant will control the expansion or contraction of the pairs of rocking levers 2020 and 1717 for thereby producing relatively great strokes of the sucker rod 7, which stroke may be increased or diminished by rearranging the pivotal connections be tween the elements 27 and 30 and the respective lowermost pair of rocking levers 1717. It will also be noted that in view of a structure of this nature, a uniform ver tical reciprocation of the sucker rod 7 will be had for thereby reducing the wear upon the stufling box 6 which as before stated, is at the present time a very pertinent disadvantage, due to the fact that practically all types of pump jacks impart a slight lateral movement to the sucker rod simultaneous with its rectilinear motion.

If desired retractile springs 33-33 may be provided between the interconnected ones of the upper and lower pairs of rocking levers l7 and 20 as more clearly shown in the detail for assisting the power plant in returning the structural elements of the present pump jack to the position shown in Figure 1.

The specific operation together with numerous advantages of a pump jack of this character will be at once appreciated by those skilled in the art and even though I have herein shown and described the most practical embodiment of the invention with which I am at this time familiar, it is nevertheless to be understood that minor changes may be made therein without departing from the spirit and scope of the appended claim.

Having thus described my invention, what I claim as new and desire to secure by Letters Patent is A pump jack comprising a supporting beam composed of spaced parallel bars fashioned between their ends to receive and permit passage of a pump casing, a cross-head adapted to be connected to the reciprocatory sucker rod of the pump, pairs of toggle levers interposed between and connected at their upper ends to said cross head and at their lower ends to said beam, the inner adjacent ends thereof being pivotally connected together, an operating rod, a vertically disposed operating lever pivotally connected between its ends upon said beam, the operating rod being connected to the upper end of said operating lever, a relatively long link also pivotally connected to said upper end and then pivotally and adjustably connected at its opposite ends to the intermediate portion of the lower lever of the remote toggle of one of the pairs, a relatively short link pivotally connected at its lower end to the corresponding end of the operating lever and pivotally and adjustably connected at its opposite end to the intermediate portion of the lower lever of the adjacent toggle, and coiled springs connected at their opposite ends to the inner pivoted ends of the levers of said toggles.

In testimony whereof I affix my signature.

ROLLIN VICTOR HILL. 

